[Python-Dev] PEP 318 trial balloon (wrappers)

[Raymond Hettinger]

[Jewett, Jim J]
>     class Foo:
>         def bar():
>             pass
>         bar = transform(bar)
 ...
> I would like to do the same with decorators.
> 
> class Foo:
>     [transform] from:
>         def bar():
>             pass
> 
> The bar() function is now defined exactly as it was before,
> except that it is an extra indent to the right.

-1 This gains nothing over what we have now but does incur costs on
readability, yet another syntax, and limiting the ability to apply a
decoration outside the class definition.

In its favor, this syntax does suggest something new which is the
possibility of having all similar decorations grouped under one banner:

class Foo:
    [transform] from"
        def bar():
            pass
        def bat():
            pass
        def baf():
            pass

That being said, grouping doesn't go much for me.  I think the key to
the previous proposals was putting wrappers on the same line as the
function definition. 



Raymond Hettinger


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